1. Geology of anthracite in the southern part of the Trevorton quadrangle;H H Arndt;Northumberland County, Pennsylvania. United States Geological Survey Coal Investigations Map C-48,1963
2. Geologic map of the south half of the Shamokin quadrangle;H H Arndt;Northumberland and Columbia Counties, Pennsylvania. United States Geological Survey Miscellaneous Geologic Investigations Map I-734,1973
3. First report of progress in the anthracite coal region: the geology of the Panther creek basin in eastern end of the southern field;C A Ashburner;Geological Survey of Pennsylvania Report of Progress AA, 407 p. plus Atlas 1. Northern coal field, 6 v., 51 plates, Atlas 2. Eastern middle coal field,1883